Radio frequency plasma operation electrode

Abstract

The invention relates to the technical field of medical equipment, in particular to a radio frequency plasma operation electrode. The radio frequency plasma operation electrode comprises an electrode assembly, an insulating base, a loop pipe and a handle. The electrode assembly comprises an electrode holder and a suction tube, and the suction tube is conducted with the electrode holder; the insulating seat is provided with an electrode holder and a suction tube; the loop tube sleeves the suction tube, is spaced from the electrode holder, and is mounted on the insulating seat; the handle is respectively connected with the suction tube and the loop tube; wherein the loop pipe has an axis; the electrode holder and the insulating seat are respectively arranged at the far end of the axis; the handle is arranged at the near end of the axis; the electrode holder comprises an electrode platform, a plurality of protruding parts, a suction hole and a trimming part, the suction hole penetrates through the electrode platform, the protruding parts are arranged relative to the electrode platform in a protruding mode and surround the suction hole, and the trimming part is arranged at the far end of the electrode platform relative to the suction hole, so that the ablation effect is enhanced while the trimming effect is ensured, and the suction hole is not prone to being blocked.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and particularly to a radiofrequency plasma surgical electrode. Background Art

[0002] In current arthroscopic surgeries, a cryogenic plasma radiofrequency knife head is usually used to cut, ablate, and stop bleeding of tissues. The cryogenic plasma radiofrequency knife head generally includes an electrode plate. By exciting ions in the electrolyte on the tissue surface through the electrode plate, a plasma thin layer is formed at the front end of the knife head. After the charged particles in the plasma obtain energy, they can break the molecular bonds in the tissue, thereby achieving cutting and ablation of the tissue. The cryogenic plasma radiofrequency knife head is also provided with a suction channel and suction holes communicating with the suction channel, so that the tissue fragments after cutting and ablation can be sucked from the suction holes to the suction channel and discharged.

[0003] However, due to the instability of the energy output to the electrode plate, the regions where arc light is generated are inconsistent, affecting the ablation effect and trimming effect on tissues. If the ablation is enhanced, it may affect the trimming of tissues. If the trimming effect on tissues is ensured, the ablation effect may be affected, resulting in the risk of blockage of the suction holes. Summary of the Invention

[0004] Based on this, it is necessary to provide a radiofrequency plasma surgical electrode to enhance the ablation effect on the basis of ensuring the trimming effect.

[0005] A radiofrequency plasma surgical electrode includes an electrode assembly, an insulating seat, a return tube, and a handle; the electrode assembly includes an electrode base and a suction tube, and the suction tube is in communication with the electrode base; the insulating seat is provided with the electrode base and the suction tube; the return tube is sleeved outside the suction tube and is spaced from the electrode base, and the return tube is installed on the insulating seat; the handle is respectively connected to the suction tube and the return tube; wherein, the return tube has an axis; the electrode base and the insulating seat are respectively arranged at the distal end of the axis, and the handle is arranged at the proximal end of the axis; the electrode base includes an electrode platform, a plurality of convex portions, suction holes, and a trimming portion, the suction holes penetrate through the electrode platform, the plurality of convex portions protrude relative to the electrode platform and are arranged around the suction holes, and the trimming portion is arranged at the distal end of the electrode platform relative to the suction holes.

[0006] It can be understood that after the electrode is energized, a low-temperature plasma can be formed. The charged particles in the plasma obtain energy and can break the molecular bonds in the tissue to achieve tissue cutting. By arranging a plurality of convex portions around the suction hole, an electric field is formed around the suction hole, increasing the ablation range. The edge of the suction hole can be ablated, enabling secondary ablation of the tissue fragments entering the suction hole and avoiding blockage of the suction hole. The ablated tissue fragments can be sucked into the suction hole and discharged through the suction channel. At the same time, the trimming portion is arranged at the distal end of the electrode platform relative to the suction hole and does not interfere with the convex portions, being able to fully exert the trimming effect on the tissue. In summary, the above settings enhance the ablation effect while ensuring the trimming effect and are not likely to cause blockage of the suction hole.

[0007] In one embodiment, along the axial direction, one side of the suction hole is provided with the convex portion, and the other side is provided with the trimming portion.

[0008] In one embodiment, along the circumferential direction of the suction hole, the size of the convex portion is L1, and the distance between any two adjacent convex portions is L2, where 1.5L1 ≤ L2 ≤ 2L1.

[0009] In one embodiment, along the axial direction, the trimming portion tapers from the proximal end to the distal end.

[0010] In one embodiment, the electrode base is welded to the suction tube to form current conduction.

[0011] In one embodiment, the electrode base is provided with an extended tail section connected to the electrode platform, and the extended tail section extends along the axial direction and is welded to the suction tube.

[0012] In one embodiment, the electrode base is made of tungsten alloy material; the tungsten alloy material includes nickel, iron, and tungsten.

[0013] In one embodiment, the tungsten alloy material includes 2% - 2.6% nickel, 1% - 2.2% iron, and 94.5% - 95.5% tungsten by mass percentage.

[0014] In one embodiment, at least an insulating layer is provided between the return tube and the suction tube.

[0015] In one embodiment, one end of the insulating layer near the extended tail section is bent outward to form a bent portion; the bent portion abuts against the end face of the insulating seat, and a sandwich space is formed between the bent portion and the surface of the suction tube. The portion of the extended tail section located outside the insulating seat can pass through the sandwich space.

[0016] In one embodiment, a limiting groove is formed by the inward depression of the surface of the insulating seat; a limiting portion is provided at one end of the circuit tube along its own axis, and the limiting portion is placed in the limiting groove and forms a limiting fit with the groove wall of the limiting groove.

[0017] In one embodiment, the insulating seat is provided with an assembly cavity, the suction tube is provided with a suction channel, the assembly cavity communicates with the suction hole and the suction channel, and the electrode platform and the suction tube respectively extend out from the assembly cavity. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a partial front view of the radiofrequency plasma surgical electrode provided by the present application;

[0020] Figure 2 It is a partial top view of the radiofrequency plasma surgical electrode provided by the present application;

[0021] Figure 3 It is a partial cross-sectional view of the radiofrequency plasma surgical electrode provided by the present application;

[0022] Figure 4 It is a partial three-dimensional view of the connection between the electrode seat and the suction tube of the radiofrequency plasma surgical electrode provided by the present application;

[0023] Figure 5 It is a three-dimensional view of the partial structure of the radiofrequency plasma surgical electrode provided by the present application;

[0024] Figure 6 It is a schematic structural diagram of the radiofrequency plasma surgical electrode provided by the present application.

[0025] Reference numerals: 100, radiofrequency plasma surgical electrode; 10, electrode seat; 11, electrode platform; 111, suction hole; 112, trimming portion; 12, convex portion; 13, extended tail section; 20, suction tube; 201, suction channel; 30, insulating seat; 301, assembly cavity; 302, limiting groove; 40, circuit tube; 41, limiting portion; 411, first limiting section; 412, second limiting section; 50, insulating layer; 51, bending portion; 511, sandwich space; 60, heat shrinkable tube; 70, handle. Detailed Embodiments

[0026] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the specific embodiments of the present application in detail with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0027] It should be noted that when a component is referred to as being "fixed to" or "provided on" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of the present application are only for the purpose of illustration and do not represent the only implementation manner.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0029] In the present application, unless otherwise clearly defined and limited, the first feature may be in direct contact with the second feature "on" or "under" the second feature, or the first feature and the second feature may be in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature has a lower horizontal height than the second feature.

[0030] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more of the related listed items.

[0031] Please refer to Figures 1 to 6, this application provides a radiofrequency plasma surgical electrode 100, which includes an electrode assembly, an insulating seat 30, and a return tube 40; the electrode assembly includes an electrode base 10 and a suction tube 20, and the suction tube is in communication with the electrode base 10; the insulating seat 30 is provided with the electrode base 10 and the suction tube 20; the return tube 40 is sleeved outside the suction tube 20 and is spaced from the electrode base 10, and the return tube 40 is installed on the insulating seat 30. With such a setting, the electrode assembly serves as the active electrode, and the return tube 40 serves as the return electrode, and the current flows from the active electrode to the return electrode. In the actual application of the radiofrequency plasma surgical electrode 100, electrolyte is dropped onto the tissue surface through an infusion system, the electrode base 10 is placed in the electrolyte, and the return tube 40 forms current conduction with the electrode base 10 through the electrolyte. That is to say, the current is conducted to the electrode base 10 through the suction tube 20, and the electrode base 10 is then conducted to the return tube 40 through the electrolyte to form a loop.

[0032] As Figure 6 shown, further, the radiofrequency plasma surgical electrode 100 further includes a handle 70, and the handle 70 is respectively connected to the suction tube 20 and the return tube 40, which is convenient for hand-held operation. Among them, the return tube 40 has an axis, with the end close to the operator as the proximal end and the end far from the operator as the distal end. The electrode base 10 and the insulating seat 30 are respectively arranged at the distal end of the axis, and the handle 70 is arranged at the proximal end of the axis.

[0033] Further, the electrode base 10 includes an electrode platform 11, a plurality of protruding portions 12, and a suction hole 111. The suction hole 111 penetrates through the electrode platform 11, and the plurality of protruding portions 12 protrude relative to the electrode platform 11 and are arranged around the suction hole 111. After the radiofrequency plasma surgical electrode 100 is powered on, an electric field is formed between the electrode base 10 and the return tube 40, and local high Joule heat is generated. The electrolyte undergoes an oxidation-reduction reaction on the surface of the electrode base 10 to form a gas film on the surface of the electrode platform 11. By providing the protruding portions 12 on the electrode platform 11, charge accumulation occurs at the protruding portions 12, and then an arc can be drawn to break through the gas film to form a plasma. The interface between the plasma and the electrolyte forms a plasma sheath layer. The plasma sheath layer can accelerate the ions, bombard the solution surface of the interface, excite active groups, and the electric field accelerates the active groups to bombard the surface of the biological tissue, break the molecular chain, so that the tissue cells of the surgical wound are decomposed in units of molecules, thereby realizing the flesh ablation, punching, and cutting effects on the surgical wound. The ablated tissue fragments can be discharged from the suction hole 111 into the suction tube 20.

[0034] As Figure 2As shown, further, the electrode base 10 further includes a trimming portion 112. The trimming portion 112 is disposed at the distal end of the electrode platform 11 relative to the suction hole 111. While maintaining a relatively small volume of the electrode base 10, the trimming portion 112 and the relatively large suction hole 111 are retained, enabling the electrode base 10 to have the function of trimming tissue and efficient suction efficiency.

[0035] For the arrangement of the above-mentioned protrusions 12, a specific electric field is formed between the protrusions 12 and the return pipe 40, and then a plasma sheath layer is formed on the surface of the protrusions 12. A plurality of protrusions 12 surround the suction hole 111, which can further ablate the tissue fragments near the suction hole 111, improve the ablation effect on large tissue fragments, and avoid blockage of the suction hole 111. At the same time, since there are no protrusions 12 on the trimming portion 112, it is overall flat, and a plasma sheath layer is formed almost only at the edge. Furthermore, it is more conducive to trimming the tissue, removing the uneven parts on the tissue surface, and stopping bleeding of the ablated tissue, ensuring that the trimming portion 112 plays a role in trimming the tissue. In addition, the trimming portion 112 is located at the distal end of the electrode platform 11 and is the first part that can be manipulated to contact the tissue. When tissue trimming is required, it is convenient for the trimming portion 112 to contact the tissue first, avoiding the protrusions 12 from contacting the tissue, which is beneficial to the operation of tissue trimming.

[0036] In summary, by setting a plurality of protrusions 12 protruding relative to the electrode platform 11 and surrounding the suction hole 111, and the trimming portion 112 is disposed at the distal end of the electrode platform 11, it is possible to ensure that the trimming portion 112 plays a trimming role while enhancing the ablation effect, further ablating large tissue fragments around the suction hole 111, and avoiding blockage of the suction hole 111.

[0037] In some embodiments, along the axial direction, a protrusion 12 is provided on one side of the suction hole 111, and a trimming portion 112 is provided on the other side, so that a plurality of spaced protrusions 12 are provided around the suction hole 111 except at the position where the trimming portion 112 is located. That is to say, except for the trimming portion 112, the remaining parts around the suction hole 111 form an ablation range for the tissue, so as to ensure that the trimming portion 112 fully exerts the trimming effect, and on this basis, form a sufficient ablation range to enhance the ablation effect.

[0038] As Figure 2 、 Figure 4 and Figure 5 shown, in an alternative embodiment, along the axial direction of the return pipe 40, the trimming portion 112 tapers from the proximal end to the distal end. In this way, the end of the trimming portion 112 forms a tip-like structure, which is conducive to flexible trimming of the tissue, and has a relatively small contact area with the tissue, which can reduce the contact with the flat parts of the tissue and improve the accuracy of trimming.

[0039] As Figure 1 、Figure 2 , Figure 3 and Figure 5 As shown in Figure 2 , Figure 3 and Figure 5 , in an optional embodiment, the insulating seat 30 is provided with an assembly cavity 301, the suction tube is provided with a suction channel 201, the assembly cavity 301 communicates with the suction hole 111 and the suction channel 201, and the electrode platform 11 and the suction tube 20 respectively extend out from the assembly cavity 301. In this way, the setting of the insulating seat 30 can further support and fix the electrode seat 10, and connect the suction hole 111 and the suction channel 201 through the assembly cavity 301. The ablated tissue fragments can enter the suction channel 201 from the suction hole 111 and be discharged along the suction channel 201 to avoid the accumulation of ablated tissue fragments on the surface of the electrode platform 11. In practical applications, the proximal end of the suction tube 20 is connected to a negative pressure system, which can suck the gas / liquid in the suction tube 20, and then suck the tissue fragments from the suction hole 111 into the suction channel 201.

[0040] As Figures 1 to 3 shown in Figures 1 to 3 , in an optional embodiment, an insulating layer 50 is provided between the return tube 40 and the suction tube 20 to insulate the return tube 40 and the suction tube 20 and prevent current conduction and short circuit between the return tube 40 and the suction tube 20.

[0041] As Figure 1 and Figure 5 shown in Figure 1 and Figure 5 , in a specific embodiment, a limiting groove 302 is formed by the inward depression of the surface of the insulating seat 30. One end of the return tube 40 along its own axis is provided with a limiting portion 41, and the limiting portion 41 is placed in the limiting groove 302 and forms a limiting fit with the groove wall of the limiting groove 302, which is beneficial to the rapid assembly and fixation of the return tube 40. Further, along the axial direction of the return tube 40, the limiting groove 302 is provided on the side of the insulating seat 30 close to the suction tube 20, so that the insulating seat 30 is closer to the tissue relative to the return tube 40 to avoid tissue burns.

[0042] As Figure 1 shown in Figure 1 , in a specific embodiment, the limiting portion 41 has a first limiting section 411 and a second limiting section 412 connected to the first limiting section 411. Along the circumferential direction of the return tube 40, the first limiting section 411 completely surrounds the insulating seat 30, and the second limiting section 412 partially surrounds the insulating seat 30. The second limiting section 412 is closer to the electrode seat 10 relative to the first limiting section 411. With this setting, the first limiting section 411 and the second limiting section 412 can have a larger fitting area with the insulating seat 30, and the partial surrounding setting of the second limiting section 412 can also avoid the structure of the insulating seat 30, so that the insulating seat 30 has sufficient structural strength to be assembled with the electrode seat 10.

[0043] As Figure 1 , Figure 2 , Figure 3 and Figure 6As shown, in a specific embodiment, a heat shrinkable tube 60 is also sleeved outside the circuit tube 40 to be insulated from the outside and has biocompatibility, and will not cause harm to the human body.

[0044] In a specific embodiment, the raised portion 12 is arranged in a cylindrical shape, which is convenient for processing, and the cylindrical raised portion 12 can form a smooth surface to guide the flow of the electrolyte and is not easy to scratch the tissue.

[0045] In a specific embodiment, the raised portion 12 is smoothly connected to the electrode platform 11 to form a smooth transition, which is conducive to the gradual accumulation of charges from the electrode platform 11 to the raised portion 12.

[0046] As Figure 3 shown, in an alternative embodiment, the thickness of the electrode platform 11 is b, where 0.2 mm ≤ b ≤ 0.35 mm. Such a setting enables the electrode platform 11 to have sufficient thickness to ensure structural strength. At the same time, it can also avoid excessive thickness causing serious heating and inconvenient operation in a narrow range. Exemplarily, b = 0.2 mm, 0.3 mm or 0.35 mm.

[0047] As Figure 1 shown, in an alternative embodiment, the height by which the raised portion 12 protrudes relative to the electrode platform 11 is h, where 0.35 mm ≤ h ≤ 0.38 mm. In this way, an electric field is formed between the raised portion 12 and the edge of the electrode platform 11. The increase in the height of the raised portion 12 is conducive to the sufficient accumulation of charges on the raised portion 12 and triggering of an arc, promoting cryoablation, reducing the risk of tissue surface burns during operation, and at the same time, avoiding too long creepage distance due to too high a height of the raised portion 12. Exemplarily, h = 0.35 mm, 0.36 mm, 0.37 mm or 0.38 mm.

[0048] In an alternative embodiment, the volume of the raised portion 12 is v and the volume of the electrode platform 11 is V, where 0.15V ≤ v ≤ 0.25V. In this way, it is ensured that the raised portion 12 has an appropriate volume to accumulate charges to trigger an arc. The volume size of the raised portion 12 is not too large, which is conducive to arranging multiple raised portions 12 on the electrode platform 11, and an appropriate interval is formed between the multiple raised portions 12, which is conducive to the arc passing through the interval to reach the edge of the suction hole 111 and is also conducive to heat dissipation. At the same time, the size of the raised portion 12 is not too small to ensure the structural size strength of the electrode platform 11 and the raised portion 12. Exemplarily, v = 0.15V, 0.2V or 0.25V.

[0049] As Figure 2As shown, in a further embodiment, along the circumferential direction of the suction hole 111, the size of the convex portion 12 is L1, and the distance between any two adjacent convex portions 12 is L2, where 1.5L1 ≤ L2 ≤ 2L1. In this way, such a setting is made to ensure the length dimension of the convex portion 12 and a sufficient number of convex portions 12 are provided, which is conducive to the excitation and capture of the arc. At the same time, by setting a sufficient distance, a sufficient amount of ions can pass through the gap between two adjacent convex portions 12 and reach the periphery of the suction hole 111 to further ablate the tissue debris at the suction hole 111. Exemplarily, L2 = 1.5L1, 1.7L1 or 2L1.

[0050] As Figure 3 and Figure 4 shown, in an alternative embodiment, the electrode base 10 is provided with an extended tail section 13 connected to the electrode platform 11. The extended tail section 13 extends along the axial direction of the return pipe 40 and is welded to the suction pipe 20. In this way, the setting of the extended tail section 13 enables the electrode base 10 to have a sufficient length to be welded to the suction pipe 20, and the welding connection method can form a stable fixing effect, making the electrode base 10 not easily fall off.

[0051] Since the electrode base 10 works immersed in the electrolyte, the electrolyte can enter the suction channel 201 through the suction hole 111, and the suction pipe 20 will be eroded. In the related art, usually an insulating seat 30 is used to fix the electrode base 10 and the suction pipe 20, and the electrode base 10 and the suction pipe 20 are electrically connected through a cable. With such a setting, after a long use time, when the suction pipe 20 is eroded, the connection between the suction pipe 20 and the insulating seat 30 will become loose, and the connection between the electrode base 10 and the suction pipe 20 will be unstable or even disconnected.

[0052] In the present application, the length of the extended tail section 13 welded to the suction pipe 20 is long enough to still maintain a stable connection with the suction pipe 20 even when the front end of the suction pipe 20 facing the electrode base 10 is gradually eroded, and it is not easy to cause loosening and disconnection between the electrode base 10 and the suction pipe 20 due to the erosion of the suction pipe 20, thus improving the working duration of the electrode.

[0053] At the same time, since an electric field is formed between the electrode platform 11 and the return pipe 40, the heat generated by the electrode platform 11 is relatively high. Through the setting of the extended tail section 13, the accumulation of heat can be reduced, and more heat can be dissipated outward.

[0054] In a specific embodiment, the extended tail section 13 and the electrode platform 11 are integrally formed, which is convenient for processing, reduces the assembly steps, increases the overall stability of the electrode base 10, and facilitates the overall welding of the electrode base 10 to the suction pipe 20.

[0055] As Figure 3As shown, in a specific embodiment, an insulating layer 50 is provided on the surface of the suction tube 20. The insulating layer 50 is connected to the suction tube 20. One end of the insulating layer 50 near the extended tail section 13 bends outward to form a bent portion 51. The bent portion 51 abuts against the end face of the insulating seat 30, and an interlayer space 511 is formed between the bent portion 51 and the surface of the suction tube 20. The portion of the extended tail section 13 located outside the insulating seat 30 can pass through the interlayer space 511. The insulating layer 50 and the suction tube 20 can clamp the bent portion 51 and limit the bent portion 51 during the assembly process. At the same time, with such a setting, the insulating layer 50 can also insulate the extended tail section 13 from the return tube 40, preventing current conduction and short circuit between the extended tail section 13 and the return tube 40.

[0056] In other embodiments, the electrode seat 10 and the suction tube 20 are electrically connected through a cable. The electrode seat 10 and the suction tube 20 can also be fixed by a snap ring, or the electrode seat 10 and the suction tube 20 are fixedly connected by injection molding and encapsulation.

[0057] In a specific embodiment, along the first direction, the size of the extended tail section 13 is 0.2 to 0.4 times the size of the electrode platform 11. With such a setting, on the basis of ensuring sufficient welding area, the extended tail section 13 is made thinner to reduce the heat generation area. Exemplarily, along the first direction, the size of the extended tail section 13 is 0.2, 0.3 or 0.4 times the size of the electrode platform 11.

[0058] As Figure 3 shown, in a specific embodiment, along the axial direction of the return tube 40, the size of the electrode platform 11 is L3, and the size of the extended tail section 13 is L4, where L3 ≤ L4 ≤ 1.7L3. With such a setting, it is ensured that the extended tail section 13 has sufficient length to be welded to the suction tube 20, and it can be ensured that the connection with the suction tube 20 can still be maintained under the erosion of the electrolyte. At the same time, it can also avoid being too long and difficult to assemble. Exemplarily, L4 = L3, 1.5L3 or 1.7L3.

[0059] In some embodiments, the electrode seat 10 is made of tungsten alloy material. Tungsten alloy has the characteristics of high temperature resistance and corrosion resistance, so as to adapt to high temperature environments and can withstand the corrosion of the electrolyte, and thus can arc-excite the plasma in the electrolyte.

[0060] In a further embodiment, the tungsten alloy material includes nickel, iron, and tungsten. By adding nickel material to the tungsten material, the risk of fracture is reduced; at the same time, by adding iron material to the tungsten material, the flexibility of the electrode base 10 can be enhanced, making it less likely to break, which is beneficial for extending the service life. It can also strengthen the excitation effect, improve the arc light intensity and continuity. The synergistic effect of the three materials can, on the basis of high temperature resistance and corrosion resistance, strengthen the arc starting effect and extend the service life. When welding and fixing, the light is stable, and a better welding effect can be achieved.

[0061] In a specific embodiment, the tungsten alloy material includes 94.5% - 95.5% tungsten by mass percentage. Exemplarily, the tungsten alloy material includes 94.5% tungsten, 95% tungsten, or 95.5% tungsten by mass percentage.

[0062] In a specific embodiment, the tungsten alloy material includes 1% - 2.2% iron by mass percentage. Exemplarily, the tungsten alloy material includes 1% iron, 2% iron, or 2.2% iron by mass percentage.

[0063] In a specific embodiment, the tungsten alloy material includes 2% - 2.6% nickel by mass percentage. Exemplarily, the tungsten alloy material includes 2% nickel, 2.3% nickel, or 2.6% nickel by mass percentage.

[0064] Through the above-mentioned specific numerical ratios, the three materials can achieve a good matching effect, play a better synergistic role, and make the electrode base 10 have the characteristics of high temperature resistance, corrosion resistance, strong flexibility, and long service life.

[0065] The technical features of the above-mentioned embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0066] The above-mentioned embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A radio frequency plasma surgical electrode, characterized in that: include: An electrode assembly, comprising an electrode seat and a suction tube, wherein the suction tube is in electrical communication with the electrode seat; An insulating seat, on which the electrode seat and the suction tube are installed; A loop pipe is sleeved outside the suction pipe and spaced apart from the electrode seat, and the loop pipe is installed on the insulating seat; A handle connected to the suction tube and the loop tube respectively; Wherein, the loop tube has an axis; the electrode seat and the insulating seat are respectively arranged at the distal end of the axis, and the handle is arranged at the proximal end of the axis; The electrode seat includes an electrode platform, a plurality of protrusions, a suction hole and a trimming portion, wherein the suction hole passes through the electrode platform, the plurality of protrusions are protruded relative to the electrode platform and arranged around the suction hole, and the trimming portion is arranged at the distal end of the electrode platform relative to the suction hole.

2. The radio frequency plasma surgical electrode according to claim 1, characterized in that: Along the axial direction, the protruding portion is provided on one side of the suction hole, and the trimming portion is provided on the other side.

3. The radio frequency plasma surgical electrode according to claim 1, characterized in that: Along the circumference of the suction hole, the size of the protrusion is L1, and the distance between any two adjacent protrusions is L2, 1.5L1≤L2≤2L1.

4. The radio frequency plasma surgical electrode according to claim 1, characterized in that: Along the axial direction, the trimming portion tapers from the proximal end toward the distal end.

5. The radio frequency plasma surgical electrode according to any one of claims 1 to 4, characterized in that: The electrode holder is connected to the suction tube by welding to form current conduction.

6. The radio frequency plasma surgical electrode according to claim 5, characterized in that: The electrode seat is provided with an extended tail section connected to the electrode platform, and the extended tail section extends along the axial direction and is welded to the suction tube.

7. The radio frequency plasma surgical electrode according to claim 6, characterized in that: The electrode holder is made of tungsten alloy material, and the tungsten alloy material includes nickel, iron and tungsten.

8. The radio frequency plasma surgical electrode according to claim 7, characterized in that: The tungsten alloy material comprises 2% to 2.6% nickel, 1% to 2.2% iron, and 94.5% to 95.5% tungsten by mass percentage.

9. The radio frequency plasma surgical electrode according to claim 6, characterized in that: An insulating layer is provided at least between the loop pipe and the suction pipe.

10. The radio frequency plasma surgical electrode according to claim 9, characterized in that: One end of the insulating layer close to the extended tail section is bent outward to form a bent portion; the bent portion abuts against the end surface of the insulating seat, and an interlayer space is formed between the bent portion and the surface of the suction tube, and the portion of the extended tail section located outside the insulating seat can be inserted into the interlayer space.

11. The radio frequency plasma surgical electrode according to claim 1, characterized in that: The surface of the insulating seat is recessed inwardly to form a limiting groove; A limiting portion is provided at one end of the loop pipe along its axial direction. The limiting portion is placed in the limiting groove and forms a limiting fit with the groove wall of the limiting groove.

12. The radio frequency plasma surgical electrode according to claim 1, characterized in that: The insulating seat is provided with an assembly cavity, the suction tube is provided with a suction channel, the assembly cavity is connected with the suction hole and the suction channel, and the electrode platform and the suction tube extend out of the assembly cavity respectively.

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